I don't think there's anything inherent in marriage that makes a person need to share every detail of their previous experience. It's true that sexual experience is an important thing to know about a partner for various reasons: knowing what they enjoy, how much they know about sex, disease status.

However, there are a lot of good reasons that bisexual people feel uncomfortable talking about it. Most of us have had partners call it quits over bisexuality, and it's hard to just keep putting it out there under those circumstances.

Ultimately, I'd say it would depend on how much value you placed on knowing every detail of someone's sexuality, and how well you expressed that to your partner. But remembering that there's a difference between 'being bisexual' and having a desire to cheat someone is important!

I would be very upset if I found out something like that, that he had never told me about, yes. Especially since we have been together for multiple years. It wouldn't be like he just haden't gotten around to it yet or anything lol.

My husband knows everything I've done. He will jokingly say he'll tell my mom (the only person in the world that doesn't know I'm bi), but he's never said it in the heat of an argument or seriously.

I think if your partner is threatening to tell your personal business then that's an issue with your partner. I've had a few asshole friends share more than I would have preferred with people I don't even know, but my partners have usually been kind enough to keep my personal business my personal business.

Past experiences shouldn't be thrown in people's faces during arguments. It's in the past - it's not like you can go back and undo what you've done even if you so desired (which I assume you probably don't). If someone is throwing your sexuality in your face like it's somehow a bad thing, I would question that person. I've had some guys get insecure about my experiences, but if they started throwing it in my face like I had done something wrong...well, I wouldn't put up with much of that.

I think in a good, solid relationship you should be able to be open about things without fear of having those things thrown in your face at a later point in time. I would always suggest feeling a person out before disclosing tons of info, but by the point of marriage you should know if your spouse is the type to use that information against you.